Noark UL489 circuit breakers, the B1N (240VAC/60VDC) and B1H (480Y/277VAC) series, are branch circuit breakers available in either standard box terminals or ring-tongue terminals (R suffix). They are designed for branch circuit protection.

B1N series is available up to 63 amp, the B1H series is available up to 32 amp.

The B1N series has standard ratings of 10kA at 240VAC and 10kA at 60VDC (1 pole)/125VDC (2 pole).

The B1H series has standard ratings of 10kA at 480Y/277VAC.

Noark also carries UL1077 circuit breakers, the B1E series, which are designed for supplementary protection.